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dm bio record: save/restore bi_end_io and bi_integrity

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[ Upstream commit 1b17159e52bb31f982f82a6278acd7fab1d3f67b ]

Also, save/restore __bi_remaining in case the bio was used in a
BIO_CHAIN (e.g. due to blk_queue_split).

Suggested-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Mike Snitzer 2020-02-28 18:00:53 -05:00 committed by Greg Kroah-Hartman
parent 886a8fb13d
commit 2e7e6de9ae
1 changed files with 15 additions and 0 deletions
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15
drivers/md/dm-bio-record.h
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@ -20,8 +20,13 @@
struct dm_bio_details {
struct gendisk *bi_disk;
u8 bi_partno;
int __bi_remaining;
unsigned long bi_flags;
struct bvec_iter bi_iter;
bio_end_io_t *bi_end_io;
#if defined(CONFIG_BLK_DEV_INTEGRITY)
struct bio_integrity_payload *bi_integrity;
#endif
};
static inline void dm_bio_record(struct dm_bio_details *bd, struct bio *bio)
@ -30,6 +35,11 @@ static inline void dm_bio_record(struct dm_bio_details *bd, struct bio *bio)
bd->bi_partno = bio->bi_partno;
bd->bi_flags = bio->bi_flags;
bd->bi_iter = bio->bi_iter;
bd->__bi_remaining = atomic_read(&bio->__bi_remaining);
bd->bi_end_io = bio->bi_end_io;
#if defined(CONFIG_BLK_DEV_INTEGRITY)
bd->bi_integrity = bio_integrity(bio);
#endif
}
static inline void dm_bio_restore(struct dm_bio_details *bd, struct bio *bio)
@ -38,6 +48,11 @@ static inline void dm_bio_restore(struct dm_bio_details *bd, struct bio *bio)
bio->bi_partno = bd->bi_partno;
bio->bi_flags = bd->bi_flags;
bio->bi_iter = bd->bi_iter;
atomic_set(&bio->__bi_remaining, bd->__bi_remaining);
bio->bi_end_io = bd->bi_end_io;
#if defined(CONFIG_BLK_DEV_INTEGRITY)
bio->bi_integrity = bd->bi_integrity;
#endif
}
#endif